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70 lines
1.6 KiB
70 lines
1.6 KiB
const streams = require('streamroller');
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const os = require('os');
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const eol = os.EOL;
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/**
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* File appender that rolls files according to a date pattern.
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* @filename base filename.
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* @pattern the format that will be added to the end of filename when rolling,
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* also used to check when to roll files - defaults to '.yyyy-MM-dd'
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* @layout layout function for log messages - defaults to basicLayout
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* @timezoneOffset optional timezone offset in minutes - defaults to system local
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*/
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function appender(
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filename,
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pattern,
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layout,
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options,
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timezoneOffset
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) {
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// the options for file appender use maxLogSize, but the docs say any file appender
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// options should work for dateFile as well.
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options.maxSize = options.maxLogSize;
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const logFile = new streams.DateRollingFileStream(
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filename,
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pattern,
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options
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);
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logFile.on("drain", () => {
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process.emit("log4js:pause", false);
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});
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const app = function (logEvent) {
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if (!logFile.write(layout(logEvent, timezoneOffset) + eol, "utf8")) {
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process.emit("log4js:pause", true);
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}
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};
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app.shutdown = function (complete) {
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logFile.write('', 'utf-8', () => {
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logFile.end(complete);
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});
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};
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return app;
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}
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function configure(config, layouts) {
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let layout = layouts.basicLayout;
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if (config.layout) {
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layout = layouts.layout(config.layout.type, config.layout);
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}
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if (!config.alwaysIncludePattern) {
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config.alwaysIncludePattern = false;
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}
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return appender(
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config.filename,
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config.pattern,
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layout,
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config,
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config.timezoneOffset
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);
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}
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module.exports.configure = configure;
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